11 lines
482 B
Markdown
11 lines
482 B
Markdown
# v4.4.18
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## Enhancements
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- Improved the placeholder syntax of the rule engine [#10470](https://github.com/emqx/emqx/pull/10470).
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The parameters of certain actions support using placeholder syntax to dynamically fill in the content of strings. The format of the placeholder syntax is `${key}`.
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Prior to the improvement, the `key` in `${key}` could only contain letters, numbers, and underscores. Now the `key` supports any UTF8 character after the improvement.
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## Bug fixes
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